Piston for internal-combustion engines



May 4, 1926.-

S. l. FEKETE PISTON FOR INTERNAL COMBUSTION ENGINES Filed Deo. 1, 1921 nINvaNJrnr n @M64 WMf/gyl Patented May 4, 19726.

STEPHEN IvANrExETE, `or DETROIT, MICHIGAN, AssIGNoR To EssExyiivro'fro'Es', or f 'nETRoI'I,.MIoIIIGAN, A coEroEATIoNfoE MICHIGAN.

rIsToN EOE INTERNAL-ooivrus'rioiv ENGINES. 1

Application led December To all whom t may conce'm."

Be itknown that I, S'rEniinNIvANFE- EETE, a citizen of the UnitedStates, residing at Detroit, countyv of Wayne, State ofMichigan, haveAinvented a ,certain new and useful Improvement, in vPistons for InternahCombustion Engines, of which the following is a. specification,reference being. had thereinto theaccompanying drawings.- Y Y VThisinvention relates to ypistons for. use in internal combustion enginesand has for an object to provide 4improved and effective means Aforautomatically conducting oil from thel cylinder walls to the wrist' pinVfor the purpose of properly lubricating the latter.Theforegoing.andotherobjects of the invention, togetherwith meansAwhereby the same'm'ay be carried into effect, will best be understoodfromvthe Vfollowing descriptionof one form or embodimentthereofillustrated in the laccompanying' i drawings,` the novel featuresof said'k invention being :par-

" ticularly pointed out in theQclaims hereunto CII appended.

Y `In said drawings,fFigs.f1 and 2 are substantially centrallongitudinal sections, taken on 'planes perpendicular to eachother, of apiston `constructed, in accordance with the invention. Y Y .5' f Fig. 3isl a transverse sectiontaken substantially on theline 3 of Figures 1and 2. Fig. 4 is a. detailperspective View of the tray and coverconstituting the oil conduit. Referring now to the drawings, .the top ofthe piston is indicated at 11 and the skirt Y at 12. The piston isprovided, adjacent the top 11, with a suitable number of annular groovesto receive the usual piston rings 13, three of said rings being shown inthe drawings. The bottom of the skirt 12 is formed with two oil scrapergrooves 14 provided with oil ports 15 through which oil collected insaid grooves is returned to the interior of the piston and thence to thecrank case or sump. On two opposite sides of the piston, the Wallsthereof are depressed inwardly, as shown at 16 (see particularly Fig.3), to form' recesses 17, said depressed portions 16 of the walls beingformed with integral out wardly extending wrist pin bearings 18stiffened by vertical webs 19. Supported in the bearings 18, is a wristpin 20 which isv encircled between said bearings by the strap portion 21of the usual connecting rod 22. At the bottoms of the recesses 17 areformed slots or'jopenings 23 through,,which oil lindingits -way intosaid recesses-mayv pass to the' interior. of ythe piston and thencereturn tothe ,sump.` j fw `1 Tv, Above thelwri'st pin lbearings 18, ,andad-v jacent the upper' ends of the recesses 17, the* pistonisformed-or,.provided -with an an-v nular oil scraping, edgedat.;V Int-he'construc tion herein shown, said edge gis providedrby theVlowermost piston -ring 13,'although, if preferred, it may comprise anintegral pori, tion of the piston itself,as in my prior application vforLetters YPatentfiled .May .20, 1921', 'Serial No. 471,101. Immediatelybe-v low the oil scraping edge a, the piston walls between the upperends ofthe recesses 17 are formed with oppositely disposed 'arcuateslots 24 lying substantially in a plane above4 the wrist vpin 20..Supported at its endsin the slots 24, and extending transverseto theyWrist pin 20, is anoil conduitJ comprising-a tray 25-andy a cover-26.`The tray 25 -is formed Ywith flaring open ends adjacent the slots 241and with 'longitudinal'Y Ysideflan'ges 25a. on lthe free. edges ofwhichthecover26 is seated when. the 4partsfare assembled.; Said Lparts.are held in assembled positionin the piston bymean's of capscrewsr27which extend" through suitablefopenings 28Min the tray andcoverl'andn'gage tapped vopenings in-lugs 29rdepending from thetop11-gof fthe piston, suitable spacing washers 30 -being interposedbetween the tray and cover and surrounding said screws. At its centralportion, the tray 25 is formed with an oil-delivering .or feedingopening 31 which is disposed immediately over the wrist pin 20 and theconnecting rod strap portion 21. Said strap portion is formed with aslot 33 adapted to receive oil from said opening 3,1. In?l terposedbetween the wrist pin 20 and strap portion 21 is a bushing 34 having anannular exterior groove 35 communicating with the slot 33, alongitudinal interior groove 36,

and a port or opening 37 connectingrsaid grooves. Y p

As will now be seen, oil removed from the cylinder wall by the oilscraping edge a, will, in part, lind its way to the recesses 17 andthence through the openings 23 to the interior of the piston andeventually to the sump. The remainder of said oil, passing through theslots 24 to the tray 25, will be conducted thereby to the oil-feedingopening 31 which will deliver the same to the slot 33 in .the connecting,rod strap portion, whence said oil will pass through the groove 35,port 37 and groove 36 in the bushing 34; to the wrist pin 20.

What I claim is:

l. A piston for internal combustion engines having an oil scraping edge,wrist pin bearings, a wrist pin carried by said bearings, and meansindependent of the piston for conducting oil from said` scraping edge to-said wrist .pi-n between said bearings.

2. A piston for internal combustion engines vhaving-an oil scrapingedge, oppositely disposed slots adjacent said edge, -wrist ;pinbearings, la wrist pin carried by said bearings, Aand :an loil conduitcomprising :a ,tray and azcover therefor l supported .by said -L slots,said conduit being arranged .to receive oil from said scraping edge andhaving anopening for -deliveringsaid oil to the said Vwrist pin.

3. A vpiston for internal combustion engines having an oil scrapingedge, wrist .pin bearings, and a -wrist pin carried by said bearings,said .piston `having also oppositely disposed slots immediately below-said oil scraping edge and located substantially yin la planeabove-said wrist pin, a vtray supported at its ends by said slots andextending Vtransverse -to .said wrist pin, said tray having flaring openends adjacentisaid slots, an oil feed opening abovesaidwristpinand'longi tudinal side iianges, a cover vfor'fsaid tray seatedon said flanges, and means comprising screws and spacing washersforholdingsaid tray Aand cover in assembled position.

4. A Episton for internal combustion rengineshaving an oil-scrapingedge, vwrist pin bearings, a wrist pin carried by said -bearings, aconnecting rod having a stra portion encircling said wrist pin andorrned with -an oil receiving slot, and an oil conduit independent vofthe piston for conducting oil from said scraping edge yto said slot.

5. A piston for internal combustion en-y gines having an oil scrapingedge, wrist pin bearings, a wrist pin carried by said'bea-rings, aconnecting rod having a strap portion lencircling said wrist pin andformed with an oil receiving slot, said piston having also oppositely,disposed slots adjacent said oil scraping edge, and an oil conduitconiprising a tray and acover therefor supported by said piston slots,saidconduit being arranged to receive oil f roinsaid scraping Iedge andhaving :an opening for .deliveringsaid oil ,to the slot inthe strapportion oflsaid connecting rod.

6. A'piston for internal combustion engines having an oilscraping edge,wrist pin bearings, a wrist pin carried by said, bearings, ka connectingrod having a strap .portion encircling ysaid wrist .pin and forined with-an oil .receiving slot, ineans for conducting oil from said scrapingedge to said slot, and/a bushing interposed between. said wrist -pin andstrap portion, said bushing having an annular exterior grooveconnnunicating with the slot in said strap portion, ya longitudinalinterior groove, and anopening connecting said grooves. v

7. A piston for internal combustion engines having wrist pin bearingsand an oil scraping edge, openings-below said edge and above the wristpin bearings, a wrist pin, a connecting rod engaging said wrist pin andhaving an oil hole on the top thereof, rand an oil conduit extendingdianietrically' of the piston with its ends at the vsaid openings andhaving an opening adjacent the oil hole in the said connecting rod.

vIn testimony whereof I aiiix iny signature.

